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Finding the Fourth Proportional to 17,991.90, 26,987.85 and 16,679.70

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Solution

The fourth proportional to 17,991.90, 26,987.85 and 16,679.70 is: 25,019.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,991.90 : 26,987.85 = 16,679.70 : x
  2. Step 2: Convert to fraction form
    17,991.90/26,987.85 = 16,679.70/x
  3. Step 3: Cross multiply
    17,991.90x = 26,987.85 × 16,679.70
  4. Step 4: Simplify right side
    17,991.90x = 450,149,241.65
  5. Step 5: Solve for x
    x = 450,149,241.65/17,991.90
  6. Step 6: Final answer
    x = 25,019.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.